...
首页> 外文期刊>Acta astronautica >Radio SETI observations of the interstellar object 'OUMUAMUA
【24h】

Radio SETI observations of the interstellar object 'OUMUAMUA

机译:无线电装置的interstellar对象'oumuamua的观察

获取原文
获取原文并翻译 | 示例
           

摘要

Motivated by the hypothesis that 'Oumuamua could conceivably be an interstellar probe, we used the Allen Telescope Array to search for radio transmissions that would indicate a non-natural origin for this object. Observations were made at radio frequencies between 1 and 10 GHz using the Array's correlator receiver with a channel bandwidth of 100 kHz. In frequency regions not corrupted by man-made interference, we find no signal flux with frequency-dependent lower limits of 0.01 Jy at 1 GHz and 0.1 Jy at 7 GHz. For a putative isotropic transmitter on the object, these limits correspond to transmitter powers of 30 mW and 300 mW, respectively. In frequency ranges that are heavily utilized for satellite communications, our sensitivity to weak signals is badly impinged, but we can still place an upper limit of 10 W for a transmitter on the asteroid. For comparison and validation should a transmitter be discovered, contemporaneous measurements were made on the solar system asteroids 2017 UZ and 2017 WC with comparable sensitivities. Because they are closer to Earth, we place upper limits on transmitter power to be 0.1 and 0.001 times the limits for 'Oumuamua, respectively.
机译:由假设的激励,“Oumuamua可以想象是星际探头,我们使用了艾伦望远镜阵列来搜索指示该对象的非自然来源的无线电传输。使用具有100kHz的信道带宽的阵列的相关器接收器,在1到10 GHz之间的无线电频率下进行观察。在由人造干扰未损坏的频率区域中,我们发现没有信号通量,频率依赖性下限为0.01 JY,在7 GHz下为0.1 JY。对于对象上推定的各向同性发射器,这些限制分别对应于30mW和300mW的发射器功率。在大量用于卫星通信的频率范围内,我们对弱信号的敏感性严重冲动,但我们仍然可以在小行星上为发射器放置10 W的上限。对于比较和验证,如果发现发射器,则在太阳系小行星2017 UZ和2017 WC上进行同期测量,具有可比的敏感性。因为它们更接近地球,我们将发射器功率的上限分别将发射器功率的上限分别放置在0.1和0.001倍“Oumuamua的限制”。

著录项

  • 来源
    《Acta astronautica》 |2019年第2期|51-54|共4页
  • 作者单位

    SETI Inst Ctr SETI Res 189 Bernardo Ave Mountain View CA 94043 USA;

    SETI Inst Ctr SETI Res 189 Bernardo Ave Mountain View CA 94043 USA;

    SETI Inst Ctr SETI Res 189 Bernardo Ave Mountain View CA 94043 USA;

    SETI Inst Ctr SETI Res 189 Bernardo Ave Mountain View CA 94043 USA;

    SETI Inst Ctr SETI Res 189 Bernardo Ave Mountain View CA 94043 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Asteroids: individual ('oumuamua); Comets; Interstellar; SETI;

    机译:小行星:个人('oumuamua);彗星;星际;seti;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号